: Developers sometimes use it to test how legacy sites render on the Gecko 1.9.2 engine.
: It maintains compatibility with older XUL-based extensions that were disabled in later "Quantum" updates. download old version of mozilla firefox 3.6
: After installation, disconnect from the internet before launching. Once open, go to Settings > Advanced > Update and select "Never check for updates" to prevent it from automatically upgrading to a modern version. Why Use Firefox 3.6? : Developers sometimes use it to test how
: Open your current browser and navigate to the Mozilla FTP server directory. download old version of mozilla firefox 3.6